LNG brake valve

A gate valve and valve stem technology, applied in the field of LNG gate valve, can solve the problems of difficult safety control, inability to seal in both directions, and inability to conduct bidirectional conduction, and achieve the effects of low processing and manufacturing cost, prevention of leakage, and easy backflow control.

Inactive Publication Date: 2014-06-04
张周卫
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the characteristics of low-temperature transportation of LNG at -162°C, the present invention invents the LNG gate valve, which is used to solve the traditional problems of bidirectional sealing, bidirectional conduction, sealing leakage, difficult safety control, large volume, and poor design when transporting LNG. Problems such as bulkiness and too long valve stem can improve the control efficiency of the LNG process in the pipeline, reduce the design pressure of the system, reduce the volume of the valve, and improve the safety of the LNG system, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • LNG brake valve
  • LNG brake valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Processing and manufacturing of main components of LNG gate valve, including hand wheel (1), stem nut (2), upper bearing (3), anti-rotation ring (4), compression nut (5), compression screw (6), first Sealing ring (7), compression pin (8), second sealing ring (9), third sealing ring (10), fourth sealing ring (11), elastic sealing ring (12), left cooling fin ( 13), upper valve body (14), sixth sealing retaining ring (15), lower valve stem (16), valve stem bolt (17), seventh sealing ring (18), left valve seat (19), first Pressure regulating valve (20), second pressure regulating valve (21), eighth sealing ring (22), lower valve body (23), gate (24), ninth sealing ring (25), third pressure regulating valve (26), the fourth pressure regulating valve (27), the right valve seat (28), the tenth sealing ring (29), the valve stem bolt nut (30), the valve stem spring (31), the sixth sealing ring (32) , upper valve stem (33), right cooling fin (34), elastic sealing support ring (3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a -162 DEG C LNG brake valve. According to the characteristic that the LNG brake valve needs two-way sealing and two-way brake, four one-way connecting pressure adjusting valves are arranged along the axis of a wedge disc, control pressure of the pressure adjusting valves can be set and adjusted respectively according to the specific requirement for the LNG pipeline process, LNG in a dead zone can be automatically guided out in a two-way mode, pressure of the two sides of the valves can be effectively controlled to be balanced, counter flow control is facilitated, and the safety functions of two-way brake, two-way sealing and two-way connecting of LNG are achieved. Meanwhile, by the adoption of the technology of retractable elastic valve rods provided with prestress springs, the labyrinth sealing technology, the multi-sealing all-welded valve technology and the like, design pressure of the valve and design pressure of an LNG conveying system can be effectively reduced, the size of the valve is smaller, safety is higher, and machining and manufacturing cost is lower.

Description

technical field [0001] The invention relates to a -162°C LNG gate valve. According to the characteristics of the LNG gate valve requiring two-way sealing and two-way gate stop, four unidirectional pressure regulating valves are arranged along the shaft at the gate plate. According to the specific requirements of the LNG pipeline process, Setting and adjusting the respective control pressures can automatically lead out the LNG in the blind area in two directions, and effectively control the pressure balance on both sides of the valve, which is easy to control the reverse flow, and can achieve the functions of two-way gate stop, two-way sealing, and two-way conduction of LNG. Security utility. At the same time, it adopts shrinkable elastic valve stem technology with prestressed spring, labyrinth sealing technology and fully welded valve technology with multiple seals. Prestressing is required to prevent leakage caused by temperature difference and strain. It can effectively re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/30F16K3/02F16K3/312F16K17/20
CPCF16K3/16F16K3/312F16K41/06
Inventor 张周卫汪雅红张小卫薛佳幸李跃
Owner 张周卫
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap